Most Articles will be assigned to a Section and Category. In many cases, you might not know where you want it to appear so put the Article in the Uncategorized Section/Category. The Articles marked as Uncategorized are handled as static content.
How to Publish an Uncategorized Article in Joomla CMS
After you create an article and a menu item in Joomla content management system (CMS), the two must be linked together before it will be available to the users of your web site. Uncategorized articles are linked directly to the menu item. If you categorize your article, the category is linked to the menu item, making all articles in the category available through the menu item.
To link a menu item to an article, follow these steps:
Click the Select/Change button in the Required Settings section of the Edit Menu Item page.
The Select Article page opens over the Edit Menu Item page.
Notice the Search, Access, State, and Category interface items at the top of the Select Article page. They make searching for an article easier if you’re working on a site with a large number of article entries.
The Article Selection page closes, and you return to the Edit Menu Item page.
Click the Save & Close button.
You return to Menu Item Manager, which displays a message to tell you that the menu item was saved.
Test the new menu item.
Test the article.
Is there an ad on your new page? If so, that ad is the product of the Banners module, which displays banner ads. To remove it, unpublish the Banners module in Module Manager — that is, click the green check mark in its Enabled column to change it to a red circle.